<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <h3>{{msg}}</h3>
        <button @click="reverse">逆转世界</button>
    </div>

    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el:'#app',
            data:{
                msg:'Hello,World!'
            },
            methods: {
                reverse(){
                    this.msg = this.msg.split('').reverse().join('')
                }
            },
        })
    </script>
</body>
</html>